变量声明中的 MySQL 语法错误 [英] MySQL Syntax Error In Variable Declaration

问题描述

我有以下 MySQL 查询:

I have the following MySQL query:

DELIMITER //
CREATE PROCEDURE InsertResult (IN winnerID INT, IN loserID INT)
BEGIN
    INSERT INTO KomperResult (WinnerID, LoserID) VALUES (@winnerID, @loserID);
    DECLARE winnerScore, loserScore INT;
    SELECT Score INTO @winnerScore FROM KomperPerson WHERE ID = @winnerID;
    SELECT Score INTO @loserScore FROM KomperPerson WHERE ID = @loserID;
    IF (@loserScore >= @winnerScore) THEN UPDATE KomperPerson SET Score = @loserScore + 1 WHERE ID = @winnerID; END IF;
END//

我收到一个错误:

DECLARE winnerScore, loserScore INT;

我做错了什么?

推荐答案

DECLAREs 需要放在你的程序的第一行.

DECLAREs need to go on the first line of your procedure.

来自文档:

DECLARE 只允许在BEGIN ... END 复合语句和必须在它的开始，在任何其他声明.

DECLARE is permitted only inside a BEGIN ... END compound statement and must be at its start, before any other statements.

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